What happend to the scheduled concerts? Seems to me that any & every gathering like that (even if it's begun as a government sanctioned counter to protests) could be useful. Course, they could also be traps.
If the government is expected to shut down phones (electricty?), I might have signs prepared demanding their being turned back on. The additional repression can also be an additional spark.
"Give the people their Voice" "Give the people their phones"
...What happend to the scheduled concerts?...
They are having them. It is attracting some. The people of Iran have not been allowed such concerts under the present regime. But I have heard reports of people singing the old national anthem at the concerts. It is a type of protest.